span.btn {
  &.cool-13 {
    .button {
      --green: #1BFD9C;
      font-size: 15px;
      padding: 0.7em 2.7em;
      letter-spacing: 0.06em;
      position: relative;
      font-family: inherit;
      border-radius: 0.6em;
      overflow: hidden;
      transition: all 0.3s;
      line-height: 1.4em;
      border: 2px solid var(--green);
      background: linear-gradient(to right, rgba(27, 253, 156, 0.1) 1%, transparent 40%, transparent 60%, rgba(27, 253, 156, 0.1) 100%);
      color: var(--green)!important;
      box-shadow: inset 0 0 10px rgba(27, 253, 156, 0.4), 0 0 9px 3px rgba(27, 253, 156, 0.1);
    }

    .button:hover {
      color: #82ffc9;
      box-shadow: inset 0 0 10px rgba(27, 253, 156, 0.6), 0 0 9px 3px rgba(27, 253, 156, 0.2);
    }

    .button:before {
      content: '';
      position: absolute;
      left: -4em;
      width: 4em;
      height: 100%;
      top: 0;
      transition: transform 0.4s ease-in-out;
      background: linear-gradient(to right, transparent 1%, rgba(27, 253, 156, 0.1) 40%, rgba(27, 253, 156, 0.1) 60%, transparent 100%);
    }

    .button:hover:before {
      transform: translateX(15em);
    }
  }
}